function searchBySheet(sheet) {
    var url = "http://localhost:8888/paper/map/inventory/table/select?fieldName=sheet&value=" + escape(sheet);

    $.ajax({
        type: "POST",
        url: url,
        dataType: "JSON",
        success: function (result) {
            console.log(result);
            var showtxt="";
            if (result.code == 400 && result.data == null) {
                showtxt = result.message;
            } else if (result.code == 200) {
                for (var i = 0; i < result.data.length; i++) {
                    var data = result.data[i];
                    showtxt += "图幅号:" + data.sheet + "\n" +
                        "比例尺:" + data.scale + "万\n" +
                        "数量:" + data.num + "\n" +
                        "类型:" + data.type + "\n" +
                        "位置:" + data.location + "\n"
                }
            }
            alert(showtxt);
        },
        error: function (result) {
            console.log(result);
        }
    });
}